Astrophysics (Index)About

dipole

(field with two poles)

The word dipole refers to two poles and is used to describe electric fields and magnetic fields that are organized around two locations of opposite polarity. In contrast, multipole indicates more locations, e.g., some of each polarity. For example, a planet's magnetic field can be basically a dipole overall, yet in detail be multipole if there are spots on the surface where one or the other polarity is strong.


The word dipole has other related uses, such as to describe antennas (dipole antenna, which creates or senses a dipole electric field), and in mathematics as a subclass of coefficients of a multipole expansion.


(electromagnetism,electricity,magnetism,physics)
Further reading:
https://en.wikipedia.org/wiki/Dipole
https://en.wikipedia.org/wiki/Dipole_antenna
https://en.wiktionary.org/wiki/dipole
https://dictionary.obspm.fr/index.php?showAll=1&formSearchTextfield=dipole
https://phys.libretexts.org/Courses/University_of_California_Davis/UCD%3A_Physics_9C__Electricity_and_Magnetism/1%3A_Electrostatic_Fields/1.4%3A_Dipoles
https://www.magnet-shop.com/lexikon/dipole

Referenced by pages:
CMB anisotropies
CMB dipole
crustal magnetism
Dominion Observatory 10.03 MHz Source Catalog (DB)
electric dipole radiation
giant planet
Long Wavelength Array (LWA)
magnetic dipole braking
magnetic dipole radiation
magnetic field
magnetometer
MSH Catalog (MSH)
multipole expansion
Murchison Widefield Array (MWA)
OVRO-LWA
Owens Valley Radio Observatory (OVRO)
spinning dust emission
Stark effect

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